To have a successful chemistry experiment, you should know what a reactant and a reagent are. A reactant is a substance which is involved in a chemical reaction. In a chemical reaction, reactants are usually transformed into products. For example, if a reactant is HCl, and a reagent is NaOH, then they will react and produce a product, such as NaCl.

If a reactant is a gas, such as CO, and a reagent is a liquid, such as water, Chemical reagents then the reactant will react and the product will be a solid, such as CO 2. A chemical equation is an expression of a chemical process, which shows the change in mass during a reaction. If you need to write down a chemical equation, then you should know what reactant and reagent are.

You should never use water as a reagent in a chemistry experiment. Although water is necessary to make all chemicals in the laboratory dissolve, it can react with the reactants which you put in your chemistry lab and turn them into other compounds. It is dangerous to use water as a reagent because it will ruin the reactants. It is a good idea to ask your teacher about using water as a reagent.